# @specy/liquid-glass-react

React wrapper for [@specy/liquid-glass](https://github.com/Specy/liquid-glass) - A Three.js powered glass effect component that recreates apple's liquid glass .

## Installation

```bash
npm install @specy/liquid-glass-react
```

## Basic Usage

Initialization is expensive, try to minimize re-renders and unnecessary unmouts.

The component does it's best to track the position of the target element in the page and update the effect, but it cannot track the `top` or `left` etc.. position changes, if you update them, you should call the `forceUpdate` method on the ref to re-render the effect, or use the `renderKey` prop to force a re-render when needed.

```tsx
import React, { useMemo } from 'react';
import { LiquidGlass } from '@specy/liquid-glass-react';

function App() {
  // ⚠️ IMPORTANT: Memoize the glassStyle object to prevent unnecessary re-renders
  const glassStyle = useMemo(() => ({
    depth: 0.5,
    segments: 32,
    radius: 0.2,
    roughness: 0.1,
    transmission: 1,
    reflectivity: 0.5,
    ior: 1.5,
    dispersion: 0.1,
    thickness: 0.5
  }), []);

  return (
    <LiquidGlass
      glassStyle={glassStyle}
      wrapperStyle={{
        position: 'fixed',
        bottom: 0,
        left: 0,
        right: 0,
        width: 'fit-content',\
        margin: '0 auto',
      }}
      style={`padding: 1rem;`}
    >
      <div>
        <h1>Hello World!</h1>
        <p>This content is rendered inside the liquid glass effect.</p>
      </div>
    </LiquidGlass>
  );
}
```

## Advanced Usage with Ref

```tsx
import React, { useRef, useMemo, useCallback } from "react"
import { LiquidGlass, type LiquidGlassRef } from "@specy/liquid-glass-react"

function AdvancedExample() {
	const glassRef = useRef<LiquidGlassRef>(null)

	// ⚠️ IMPORTANT: Memoize all objects and callbacks
	const glassStyle = useMemo(
		() => ({
			depth: 0.8,
			segments: 64,
			radius: 0.3,
			transmission: 0.95,
			roughness: 0.05,
		}),
		[]
	)

	const onReady = useCallback((instance) => {
		console.log("LiquidGlass instance ready:", instance)
	}, [])

	const handleUpdateScreenshot = useCallback(async () => {
		await glassRef.current?.updateScreenshot()
	}, [])

	const handleUpdateStyle = useCallback(() => {
		glassRef.current?.updateGlassStyle({
			depth: Math.random(),
			transmission: 0.8 + Math.random() * 0.2,
		})
	}, [])

	return (
		<div>
			<LiquidGlass ref={glassRef} glassStyle={glassStyle} onReady={onReady}>
				<div style={{ padding: "30px" }}>
					<h2>Interactive Glass Effect</h2>
					<button onClick={handleUpdateScreenshot}>Update Screenshot</button>
					<button onClick={handleUpdateStyle}>Randomize Style</button>
				</div>
			</LiquidGlass>
		</div>
	)
}
```

## Props

| Prop            | Type                              | Default         | Description                                                         |
| --------------- | --------------------------------- | --------------- | ------------------------------------------------------------------- |
| `style`         | `string`                          | `''`            | Custom CSS styles to apply to the glass container                   |
| `wrapperStyle`  | `React.CSSProperties`             | `{}`            | React CSS properties to apply to the wrapper div                    |
| `glassStyle`    | `GlassStyle`                      | `{}`            | Glass material properties (see GlassStyle interface)                |
| `children`      | `React.ReactNode`                 | `undefined`     | Content to render inside the glass container                        |
| `onReady`       | `(instance: LiquidGlass) => void` | `undefined`     | Callback when the liquid glass instance is ready                    |
| `targetElement` | `HTMLElement`                     | `document.body` | The target element to capture for the glass background effect       |
| `renderKey`     | `string                           | number`         | Unique key to force re-render the component when changed (manually) |

## GlassStyle Interface

```tsx
interface GlassStyle {
	depth?: number // Depth of the glass effect (0-1)
	segments?: number // Number of geometry segments for smoothness
	radius?: number // Border radius (0-1)
	tint?: number | null // Color tint (hex number or null)
	roughness?: number // Surface roughness (0-1)
	transmission?: number // Light transmission (0-1)
	reflectivity?: number // Surface reflectivity (0-1)
	ior?: number // Index of refraction
	dispersion?: number // Chromatic dispersion effect
	thickness?: number // Glass thickness
}
```

## Ref Methods

The component exposes several methods through the ref:

```tsx
interface LiquidGlassRef {
	getInstance(): LiquidGlass | null
	updateScreenshot(): Promise<void>
	forceUpdate(): Promise<void>
	updateGlassStyle(style: Partial<GlassStyle>): void
	getGlassStyle(): Required<GlassStyle> | null
	getElement(): HTMLElement | null
	getContent(): HTMLDivElement | null
  forcePositionUpdate(): void
  forceSizeUpdate(): void
}
```

## Contributing

Issues and pull requests are welcome at the [main repository](https://github.com/Specy/liquid-glass).